1421569920 has 256 divisors, whose sum is σ = 4858056000. Its totient is φ = 352321536.

The previous prime is 1421569913. The next prime is 1421569939. The reversal of 1421569920 is 299651241.

1421569920 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1421569920² = 4041722074897612800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3165856 + ... + 3166304.

Almost surely, 2^1421569920 is an apocalyptic number.

1421569920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421569920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2429028000).

1421569920 is an abundant number, since it is smaller than the sum of its proper divisors (3436486080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421569920 is a wasteful number, since it uses less digits than its factorization.

1421569920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1421569920 is about 37703.7122840709. The cubic root of 1421569920 is about 1124.4049317141.

It can be divided in two parts, 142156 and 9920, that added together give a triangular number (152076 = T₅₅₁).

The spelling of 1421569920 in words is "one billion, four hundred twenty-one million, five hundred sixty-nine thousand, nine hundred twenty".